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5dd3a0cc17
Signed-off-by: Andreas Schneider <asn@samba.org> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
529 lines
15 KiB
C
529 lines
15 KiB
C
/*
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Unix SMB/CIFS implementation.
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remote dcerpc operations
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Copyright (C) Stefan (metze) Metzmacher 2004
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Copyright (C) Julien Kerihuel 2008-2009
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include <tevent.h>
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#include "rpc_server/dcerpc_server.h"
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#include "auth/auth.h"
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#include "auth/credentials/credentials.h"
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#include "librpc/rpc/dcerpc.h"
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#include "librpc/ndr/ndr_table.h"
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#include "param/param.h"
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NTSTATUS dcerpc_server_remote_init(TALLOC_CTX *ctx);
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#define DCESRV_REMOTE_ASSOC_MAGIC 0x782f50c4
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struct dcesrv_remote_assoc {
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uint32_t assoc_group_id;
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};
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#define DCESRV_REMOTE_PRIVATE_MAGIC 0x7eceafa6
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struct dcesrv_remote_private {
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struct dcerpc_pipe *c_pipe;
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};
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static NTSTATUS remote_op_reply(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, void *r)
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{
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return NT_STATUS_OK;
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}
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static NTSTATUS remote_op_bind(struct dcesrv_connection_context *context,
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const struct dcesrv_interface *iface)
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{
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return NT_STATUS_OK;
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}
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static NTSTATUS remote_get_private(struct dcesrv_call_state *dce_call,
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struct dcesrv_remote_private **_priv)
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{
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const struct ndr_interface_table *table =
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(const struct ndr_interface_table *)dce_call->context->iface->private_data;
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struct dcesrv_remote_private *priv = NULL;
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struct dcesrv_remote_assoc *assoc = NULL;
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const char *binding = NULL;
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const char *user, *pass, *domain;
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struct cli_credentials *credentials;
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bool must_free_credentials = false;
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bool machine_account;
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bool allow_anonymous;
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struct dcerpc_binding *b;
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struct composite_context *pipe_conn_req;
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uint32_t flags = 0;
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NTSTATUS status;
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priv = dcesrv_iface_state_find_conn(dce_call,
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DCESRV_REMOTE_PRIVATE_MAGIC,
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struct dcesrv_remote_private);
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if (priv != NULL) {
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*_priv = priv;
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return NT_STATUS_OK;
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}
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priv = talloc_zero(dce_call, struct dcesrv_remote_private);
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if (priv == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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assoc = dcesrv_iface_state_find_assoc(dce_call,
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DCESRV_REMOTE_ASSOC_MAGIC,
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struct dcesrv_remote_assoc);
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if (assoc == NULL) {
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assoc = talloc_zero(dce_call, struct dcesrv_remote_assoc);
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if (assoc == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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}
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binding = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx,
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NULL,
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"dcerpc_remote",
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"binding");
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if (binding == NULL) {
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DEBUG(0,("You must specify a DCE/RPC binding string\n"));
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return NT_STATUS_INVALID_PARAMETER;
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}
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user = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "user");
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pass = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "password");
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domain = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dceprc_remote", "domain");
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machine_account = lpcfg_parm_bool(dce_call->conn->dce_ctx->lp_ctx,
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NULL,
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"dcerpc_remote",
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"use_machine_account",
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false);
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allow_anonymous = lpcfg_parm_bool(dce_call->conn->dce_ctx->lp_ctx,
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NULL,
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"dcerpc_remote",
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"allow_anonymous_fallback",
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false);
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credentials = dcesrv_call_credentials(dce_call);
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if (user && pass) {
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bool ok;
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DEBUG(5, ("dcerpc_remote: RPC Proxy: Using specified account\n"));
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credentials = cli_credentials_init(priv);
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if (!credentials) {
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return NT_STATUS_NO_MEMORY;
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}
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must_free_credentials = true;
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ok = cli_credentials_set_conf(credentials,
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dce_call->conn->dce_ctx->lp_ctx);
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if (!ok) {
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return NT_STATUS_INTERNAL_ERROR;
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}
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cli_credentials_set_username(credentials, user, CRED_SPECIFIED);
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if (domain) {
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cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
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}
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cli_credentials_set_password(credentials, pass, CRED_SPECIFIED);
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} else if (machine_account) {
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DEBUG(5, ("dcerpc_remote: RPC Proxy: Using machine account\n"));
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credentials = cli_credentials_init_server(
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priv,
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dce_call->conn->dce_ctx->lp_ctx);
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if (!credentials) {
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return NT_STATUS_NO_MEMORY;
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}
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must_free_credentials = true;
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} else if (credentials != NULL) {
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DEBUG(5, ("dcerpc_remote: RPC Proxy: Using delegated credentials\n"));
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} else if (allow_anonymous) {
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DEBUG(5, ("dcerpc_remote: RPC Proxy: Using anonymous\n"));
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credentials = cli_credentials_init_anon(priv);
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if (!credentials) {
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return NT_STATUS_NO_MEMORY;
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}
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must_free_credentials = true;
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} else {
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DEBUG(1,("dcerpc_remote: RPC Proxy: You must supply binding, user and password or have delegated credentials\n"));
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return NT_STATUS_INVALID_PARAMETER;
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}
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/* parse binding string to the structure */
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status = dcerpc_parse_binding(priv, binding, &b);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
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return status;
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}
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/* If we already have a remote association group ID, then use that */
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if (assoc->assoc_group_id != 0) {
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status = dcerpc_binding_set_assoc_group_id(b,
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assoc->assoc_group_id);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0, ("dcerpc_binding_set_assoc_group_id() - %s'\n",
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nt_errstr(status)));
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return status;
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}
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}
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status = dcerpc_binding_set_abstract_syntax(b, &table->syntax_id);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0, ("dcerpc_binding_set_abstract_syntax() - %s'\n",
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nt_errstr(status)));
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return status;
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}
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if (dce_call->conn->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED) {
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status = dcerpc_binding_set_flags(b, DCERPC_CONCURRENT_MULTIPLEX, 0);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0, ("dcerpc_binding_set_flags(CONC_MPX) - %s'\n",
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nt_errstr(status)));
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return status;
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}
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}
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DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(dce_call->context, b)));
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pipe_conn_req = dcerpc_pipe_connect_b_send(priv, b, table,
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credentials, dce_call->event_ctx, dce_call->conn->dce_ctx->lp_ctx);
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status = dcerpc_pipe_connect_b_recv(pipe_conn_req, priv, &(priv->c_pipe));
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if (must_free_credentials) {
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talloc_free(credentials);
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}
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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if (dce_call->conn->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED) {
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flags = dcerpc_binding_get_flags(priv->c_pipe->binding);
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if (!(flags & DCERPC_CONCURRENT_MULTIPLEX)) {
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DEBUG(1,("dcerpc_remote: RPC Proxy: "
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"Remote server doesn't support MPX\n"));
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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}
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if (assoc->assoc_group_id == 0) {
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assoc->assoc_group_id =
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dcerpc_binding_get_assoc_group_id(priv->c_pipe->binding);
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if (assoc->assoc_group_id == 0) {
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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status = dcesrv_iface_state_store_assoc(dce_call,
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DCESRV_REMOTE_ASSOC_MAGIC,
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assoc);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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}
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status = dcesrv_iface_state_store_conn(dce_call,
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DCESRV_REMOTE_PRIVATE_MAGIC,
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priv);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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*_priv = priv;
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return NT_STATUS_OK;
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}
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static NTSTATUS remote_op_ndr_pull(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct ndr_pull *pull, void **r)
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{
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enum ndr_err_code ndr_err;
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const struct ndr_interface_table *table = (const struct ndr_interface_table *)dce_call->context->iface->private_data;
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uint16_t opnum = dce_call->pkt.u.request.opnum;
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dce_call->fault_code = 0;
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if (opnum >= table->num_calls) {
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dce_call->fault_code = DCERPC_FAULT_OP_RNG_ERROR;
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return NT_STATUS_NET_WRITE_FAULT;
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}
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/*
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* We don't have support for calls with pipes.
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*/
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if (table->calls[opnum].in_pipes.num_pipes != 0) {
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dce_call->fault_code = DCERPC_FAULT_OP_RNG_ERROR;
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return NT_STATUS_NET_WRITE_FAULT;
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}
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if (table->calls[opnum].out_pipes.num_pipes != 0) {
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dce_call->fault_code = DCERPC_FAULT_OP_RNG_ERROR;
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return NT_STATUS_NET_WRITE_FAULT;
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}
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*r = talloc_size(mem_ctx, table->calls[opnum].struct_size);
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if (!*r) {
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return NT_STATUS_NO_MEMORY;
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}
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/* unravel the NDR for the packet */
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ndr_err = table->calls[opnum].ndr_pull(pull, NDR_IN, *r);
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if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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dce_call->fault_code = DCERPC_FAULT_NDR;
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return NT_STATUS_NET_WRITE_FAULT;
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}
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return NT_STATUS_OK;
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}
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static void remote_op_dispatch_done(struct tevent_req *subreq);
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struct dcesrv_remote_call {
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struct dcesrv_call_state *dce_call;
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struct dcesrv_remote_private *priv;
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};
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static NTSTATUS remote_op_dispatch(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, void *r)
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{
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struct dcesrv_remote_call *rcall = NULL;
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struct dcesrv_remote_private *priv = NULL;
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uint16_t opnum = dce_call->pkt.u.request.opnum;
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const struct ndr_interface_table *table = dce_call->context->iface->private_data;
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const struct ndr_interface_call *call;
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const char *name;
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struct tevent_req *subreq;
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NTSTATUS status;
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name = table->calls[opnum].name;
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call = &table->calls[opnum];
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status = remote_get_private(dce_call, &priv);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("dcesrv_remote: call[%s] %s\n", name, nt_errstr(status)));
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return status;
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}
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rcall = talloc_zero(dce_call, struct dcesrv_remote_call);
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if (rcall == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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rcall->dce_call = dce_call;
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rcall->priv = priv;
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if (priv->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_IN) {
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ndr_print_function_debug(call->ndr_print, name, NDR_IN | NDR_SET_VALUES, r);
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}
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priv->c_pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
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/* we didn't use the return code of this function as we only check the last_fault_code */
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subreq = dcerpc_binding_handle_call_send(rcall, dce_call->event_ctx,
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priv->c_pipe->binding_handle,
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NULL, table,
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opnum, mem_ctx, r);
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if (subreq == NULL) {
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DEBUG(0,("dcesrv_remote: call[%s] dcerpc_binding_handle_call_send() failed!\n", name));
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return NT_STATUS_NO_MEMORY;
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}
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tevent_req_set_callback(subreq, remote_op_dispatch_done, rcall);
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dce_call->state_flags |= DCESRV_CALL_STATE_FLAG_ASYNC;
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return NT_STATUS_OK;
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}
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static void remote_op_dispatch_done(struct tevent_req *subreq)
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{
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struct dcesrv_remote_call *rcall =
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tevent_req_callback_data(subreq,
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struct dcesrv_remote_call);
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struct dcesrv_call_state *dce_call = rcall->dce_call;
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struct dcesrv_remote_private *priv = rcall->priv;
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uint16_t opnum = dce_call->pkt.u.request.opnum;
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const struct ndr_interface_table *table = dce_call->context->iface->private_data;
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const struct ndr_interface_call *call;
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const char *name;
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NTSTATUS status;
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name = table->calls[opnum].name;
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call = &table->calls[opnum];
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/* we didn't use the return code of this function as we only check the last_fault_code */
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status = dcerpc_binding_handle_call_recv(subreq);
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TALLOC_FREE(subreq);
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dce_call->fault_code = priv->c_pipe->last_fault_code;
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if (dce_call->fault_code != 0) {
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DEBUG(0,("dcesrv_remote: call[%s] failed with: %s!\n",
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name, dcerpc_errstr(dce_call, dce_call->fault_code)));
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goto reply;
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}
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if (NT_STATUS_IS_OK(status) &&
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(priv->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_OUT)) {
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ndr_print_function_debug(call->ndr_print, name, NDR_OUT, dce_call->r);
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}
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reply:
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status = dcesrv_reply(dce_call);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("dcesrv_remote: call[%s]: dcesrv_reply() failed - %s\n",
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name, nt_errstr(status)));
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}
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}
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static NTSTATUS remote_op_ndr_push(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct ndr_push *push, const void *r)
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{
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enum ndr_err_code ndr_err;
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const struct ndr_interface_table *table = dce_call->context->iface->private_data;
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uint16_t opnum = dce_call->pkt.u.request.opnum;
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/* unravel the NDR for the packet */
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ndr_err = table->calls[opnum].ndr_push(push, NDR_OUT, r);
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if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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dce_call->fault_code = DCERPC_FAULT_NDR;
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return NT_STATUS_NET_WRITE_FAULT;
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}
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return NT_STATUS_OK;
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}
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static NTSTATUS remote_register_one_iface(struct dcesrv_context *dce_ctx, const struct dcesrv_interface *iface)
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{
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unsigned int i;
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const struct ndr_interface_table *table = iface->private_data;
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for (i=0;i<table->endpoints->count;i++) {
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NTSTATUS ret;
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const char *name = table->endpoints->names[i];
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ret = dcesrv_interface_register(dce_ctx, name, NULL, iface, NULL);
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if (!NT_STATUS_IS_OK(ret)) {
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DEBUG(1,("remote_op_init_server: failed to register endpoint '%s'\n",name));
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return ret;
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}
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}
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return NT_STATUS_OK;
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}
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static NTSTATUS remote_op_init_server(struct dcesrv_context *dce_ctx, const struct dcesrv_endpoint_server *ep_server)
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{
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unsigned int i;
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char **ifaces = str_list_make(dce_ctx, lpcfg_parm_string(dce_ctx->lp_ctx, NULL, "dcerpc_remote", "interfaces"),NULL);
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if (!ifaces) {
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DEBUG(3,("remote_op_init_server: no interfaces configured\n"));
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return NT_STATUS_OK;
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}
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for (i=0;ifaces[i];i++) {
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NTSTATUS ret;
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struct dcesrv_interface iface;
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if (!ep_server->interface_by_name(&iface, ifaces[i])) {
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DEBUG(0,("remote_op_init_server: failed to find interface = '%s'\n", ifaces[i]));
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talloc_free(ifaces);
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return NT_STATUS_UNSUCCESSFUL;
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}
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ret = remote_register_one_iface(dce_ctx, &iface);
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if (!NT_STATUS_IS_OK(ret)) {
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DEBUG(0,("remote_op_init_server: failed to register interface = '%s'\n", ifaces[i]));
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talloc_free(ifaces);
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return ret;
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}
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}
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talloc_free(ifaces);
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return NT_STATUS_OK;
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}
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static NTSTATUS remote_op_shutdown_server(struct dcesrv_context *dce_ctx,
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const struct dcesrv_endpoint_server *ep_server)
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{
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return NT_STATUS_OK;
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}
|
|
|
|
static bool remote_fill_interface(struct dcesrv_interface *iface, const struct ndr_interface_table *if_tabl)
|
|
{
|
|
iface->name = if_tabl->name;
|
|
iface->syntax_id = if_tabl->syntax_id;
|
|
|
|
iface->bind = remote_op_bind;
|
|
iface->unbind = NULL;
|
|
|
|
iface->ndr_pull = remote_op_ndr_pull;
|
|
iface->dispatch = remote_op_dispatch;
|
|
iface->reply = remote_op_reply;
|
|
iface->ndr_push = remote_op_ndr_push;
|
|
|
|
iface->private_data = if_tabl;
|
|
iface->flags = 0;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool remote_op_interface_by_uuid(struct dcesrv_interface *iface, const struct GUID *uuid, uint32_t if_version)
|
|
{
|
|
const struct ndr_interface_list *l;
|
|
|
|
for (l=ndr_table_list();l;l=l->next) {
|
|
if (l->table->syntax_id.if_version == if_version &&
|
|
GUID_equal(&l->table->syntax_id.uuid, uuid)==0) {
|
|
return remote_fill_interface(iface, l->table);
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool remote_op_interface_by_name(struct dcesrv_interface *iface, const char *name)
|
|
{
|
|
const struct ndr_interface_table *tbl = ndr_table_by_name(name);
|
|
|
|
if (tbl)
|
|
return remote_fill_interface(iface, tbl);
|
|
|
|
return false;
|
|
}
|
|
|
|
NTSTATUS dcerpc_server_remote_init(TALLOC_CTX *ctx)
|
|
{
|
|
NTSTATUS ret;
|
|
static const struct dcesrv_endpoint_server ep_server = {
|
|
/* fill in our name */
|
|
.name = "remote",
|
|
|
|
.initialized = false,
|
|
|
|
/* fill in all the operations */
|
|
.init_server = remote_op_init_server,
|
|
.shutdown_server = remote_op_shutdown_server,
|
|
|
|
.interface_by_uuid = remote_op_interface_by_uuid,
|
|
.interface_by_name = remote_op_interface_by_name
|
|
};
|
|
|
|
/* register ourselves with the DCERPC subsystem. */
|
|
ret = dcerpc_register_ep_server(&ep_server);
|
|
if (!NT_STATUS_IS_OK(ret)) {
|
|
DEBUG(0,("Failed to register 'remote' endpoint server!\n"));
|
|
return ret;
|
|
}
|
|
|
|
/* We need the full DCE/RPC interface table */
|
|
ndr_table_init();
|
|
|
|
return ret;
|
|
}
|